<template>
    <div class="chart-container" style="width: 100%;">
        <el-row >
            <el-col :span="24">
                <div id="chartMaine3" style="width:100%; height:560px;"></div>
            </el-col>
        </el-row>
    </div>
</template>
 
<script>
    // 使用echart的3d功能需要另外安装echarts-gl  安装指令： cnpm install echarts-gl
    import 'echarts-gl'
    export default {
        name: "Demo2",
        data() {
            return {
                chartMaine3:null,
            }
        },
 
        methods: {
            drawMaine3Chart(){
                this.chartMaine3 = this.$echarts.init(document.getElementById('chartMaine3'));
                var ROOT_PATH = 'https://cdn.jsdelivr.net/gh/apache/echarts-website@asf-site/examples';
 
                this.$axios({
                    url: 'https://cdn.jsdelivr.net/gh/apache/echarts-website@asf-site/examples/data-gl/asset/data/flights.json',
                    headers:'',
                    data: {},
                    method: 'get',
                    success: (data) => {
                        var airports = data.airports.map(function (item) {
                            return {
                                coord: [item[3], item[4]]
                            };
                        });
                        function getAirportCoord(idx) {
                            return [data.airports[idx][3], data.airports[idx][4]];
                        }
                        // Route: [airlineIndex, sourceAirportIndex, destinationAirportIndex]
                        var routesGroupByAirline = {};
                        data.routes.forEach(function (route) {
                            var airline = data.airlines[route[0]];
                            var airlineName = airline[0];
                            if (!routesGroupByAirline[airlineName]) {
                                routesGroupByAirline[airlineName] = [];
                            }
                            routesGroupByAirline[airlineName].push(route);
                        });
                        var pointsData = [];
                        data.routes.forEach(function (airline) {
                            pointsData.push(getAirportCoord(airline[1]));
                            pointsData.push(getAirportCoord(airline[2]));
                        });
                        var series = data.airlines
                            .map(function (airline) {
                                var airlineName = airline[0];
                                var routes = routesGroupByAirline[airlineName];
                                if (!routes) {
                                    return null;
                                }
                                return {
                                    type: 'lines3D',
                                    name: airlineName,
                                    effect: {
                                        show: true,
                                        trailWidth: 2,
                                        trailLength: 0.15,
                                        trailOpacity: 1,
                                        trailColor: 'rgb(30, 30, 60)'
                                    },
                                    lineStyle: {
                                        width: 1,
                                        color: 'rgb(50, 50, 150)',
                                        // color: 'rgb(118, 233, 241)',
                                        opacity: 0.1
                                    },
                                    blendMode: 'lighter',
                                    data: routes.map(function (item) {
                                        return [airports[item[1]].coord, airports[item[2]].coord];
                                    })
                                };
                            })
                            .filter(function (series) {
                                return !!series;
                            });
                        series.push({
                            type: 'scatter3D',
                            coordinateSystem: 'globe',
                            blendMode: 'lighter',
                            symbolSize: 2,
                            itemStyle: {
                                color: 'rgb(50, 50, 150)',
                                opacity: 0.2
                            },
                            data: pointsData
                        });
                        this.chartMaine3.setOption({
                            legend: {
                                selectedMode: 'single',
                                left: 'left',
                                data: Object.keys(routesGroupByAirline),
                                orient: 'vertical',
                                textStyle: {
                                    color: '#fff'
                                }
                            },
                            globe: {
                                environment: ROOT_PATH + '/data-gl/asset/starfield.jpg',
                                heightTexture:
                                    ROOT_PATH + '/data-gl/asset/bathymetry_bw_composite_4k.jpg',
                                displacementScale: 0.1,
                                displacementQuality: 'high',
                                baseColor: '#000',
                                shading: 'realistic',
                                realisticMaterial: {
                                    roughness: 0.2,
                                    metalness: 0
                                },
                                postEffect: {
                                    enable: true,
                                    depthOfField: {
                                        enable: false,
                                        focalDistance: 150
                                    }
                                },
                                temporalSuperSampling: {
                                    enable: true
                                },
                                light: {
                                    ambient: {
                                        intensity: 0
                                    },
                                    main: {
                                        intensity: 0.1,
                                        shadow: false
                                    },
                                    ambientCubemap: {
                                        texture: ROOT_PATH + '/data-gl/asset/lake.hdr',
                                        exposure: 1,
                                        diffuseIntensity: 0.5,
                                        specularIntensity: 2
                                    }
                                },
                                viewControl: {
                                    autoRotate: false
                                },
                                silent: true
                            },
                            series: series
                        });
                        window.addEventListener('keydown', function () {
                            series.forEach(function (series, idx) {
                                this.chartMaine3.dispatchAction({
                                    type: 'lines3DToggleEffect',
                                    seriesIndex: idx
                                });
                            });
                        });
                    },
                    error:(e)=>{
 
                    }
                })
 
            },
 
            drawCharts() {
                this.drawMaine3Chart()
            },
        },
 
        mounted: function () {
            this.drawCharts()
        },
        updated: function () {
            this.drawCharts()
        }
    }
</script>
 
<style scoped>
    .chart-container {
        background-color:white;
        height: 100%;
        width: 100%;
    }
 
    .el-col {
        padding: 30px;
    }
</style>